<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>登录</title>

    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
      <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
    <![endif]-->
      <style>
          body {
              padding-top: 140px;
              padding-bottom: 40px;
              background-color: #eee;
            }

            .form-signin {
              max-width: 330px;
              padding: 15px;
              margin: 0 auto;
            }
            .form-signin .form-signin-heading,
            .form-signin .checkbox {
              margin-bottom: 10px;
            }
            .form-signin .checkbox {
              font-weight: normal;
            }
            .form-signin .form-control {
              position: relative;
              height: auto;
              -webkit-box-sizing: border-box;
                 -moz-box-sizing: border-box;
                      box-sizing: border-box;
              padding: 10px;
              font-size: 16px;
            }
            .form-signin .form-control:focus {
              z-index: 2;
            }
            .form-signin input[type="email"] {
              margin-bottom: -1px;
              border-bottom-right-radius: 0;
              border-bottom-left-radius: 0;
            }
            .form-signin input[type="password"] {
              margin-bottom: 10px;
              border-top-left-radius: 0;
              border-top-right-radius: 0;
            }
      </style>
  </head>
  <body>
    <div class="container">

      <form class="form-signin">
        <h2 class="form-signin-heading">登录</h2>
        <label for="inputEmail" class="sr-only">Email address</label>
        <input type="email" id="inputEmail" class="form-control" placeholder="Email address" required="" autofocus="">
        <label for="inputPassword" class="sr-only">Password</label>
        <input type="password" id="inputPassword" class="form-control" placeholder="Password" required="">
        <div class="checkbox">
          <label>
            <input type="checkbox" value="remember-me"> Remember me
          </label>
        </div>
        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
      </form>

    </div>

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
    <!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
  </body>
</html>